Nit may refer to any of the following:
1. A Nit is a measure of light over a surface; more specifically, one nit is equal to one candela per square meter. It is used as a measurement of the brightness on a display. The higher the nit, the brighter the image will be.
2. Short for network information table, NIT is commonly used to describe a table listing network information.
3. Short for Network Interface Tap, NIT is a network device driver included with the SunOS used to capture packets only received by the interface.
4. Nit is a term used to describe a small and unimportant imperfection with a product.